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26.09.2009 3 Experiments at MAMI-C Intro-1 From Accelerator physics point of view we are (almost) in the Post MAMI-C aera: Can one think of a NEW accelerator project at Mainz being dedicated to electron scattering experiments ? MAMI-C: In Operation since 2/2007 100 A, 1508 MeV c.w. beam op-time:7000 hours (2008) 2/3 of beam time spin polarized beam energy inreased to 1600 MeV MESA E-1 E-2 beam dump

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26.09.2009 4 The Paradigma Intro -2 MESA must allow to perform electron scattering experiments which are: not feasible at MAMI-C have an important physics impact are competetive ….but must be realized within the given constraints precision frontier new experimental regime